# Distance from Adelaide (ADL) to St Mary'S (KSM)

> 11,972 km · estimated flight time 15h · Ultra-long-haul route.

## Summary

- **Distance**: 11,972 km / 7,439 mi / 6,465 nm
- **Estimated flight time**: 15h
- **Heading**: 25° (north northeast)
- **Return heading**: 227° (southwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Australia) → United States
- **Intercontinental**: Oceania → North America
- **Time difference**: -17.5h (When it's 07:15 in Adelaide, it's 13:45 in St Mary'S)
- **Elevation difference**: 294 ft (KSM is higher than ADL)

## Airports

### [Adelaide International Airport (ADL)](https://www.flightduration.online/airport/adl-adelaide-adelaide-international-airport/1ef266e0-1682-610e-a772-06bb2780ed98)

- City: Adelaide, Australia
- ICAO: YPAD
- Timezone: Australia/Adelaide
- Coordinates: -34.950000, 138.530000
- Elevation: 20 ft

### [St Mary's Airport (KSM)](https://www.flightduration.online/airport/ksm-st-marys-st-marys-airport/1ef266df-8810-6b14-99ba-06bb2780ed98)

- City: St Mary'S, United States
- ICAO: PASM
- Timezone: America/Nome
- Coordinates: 62.060000, -163.300000
- Elevation: 314 ft

## Route notes

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

Time-zone information: When it's 07:15 in Adelaide, it's 13:45 in St Mary'S.
With a 17.5-hour time difference, expect significant jet lag.

## Related

- [Adelaide International Airport (ADL)](https://www.flightduration.online/airport/adl-adelaide-adelaide-international-airport/1ef266e0-1682-610e-a772-06bb2780ed98)
- [St Mary's Airport (KSM)](https://www.flightduration.online/airport/ksm-st-marys-st-marys-airport/1ef266df-8810-6b14-99ba-06bb2780ed98)
- [Flight duration calculator](/#calculator)